src/collecty/plugins/memory.py

   1 #!/usr/bin/python
   2 ###############################################################################
   3 #                                                                             #
   4 # collecty - A system statistics collection daemon for IPFire                 #
   5 # Copyright (C) 2012 IPFire development team                                  #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 from __future__ import division
  23
  24 import base
  25
  26 from ..i18n import _
  27
  28 class GraphTemplateMemory(base.GraphTemplate):
  29         name = "memory"
  30
  31         rrd_graph = [
  32                 "DEF:used=%(file)s:used:AVERAGE",
  33                 "DEF:cached=%(file)s:cached:AVERAGE",
  34                 "DEF:buffered=%(file)s:buffered:AVERAGE",
  35                 "DEF:free=%(file)s:free:AVERAGE",
  36                 "DEF:swap=%(file)s:swap:AVERAGE",
  37
  38                 "AREA:used#90EE90:%-15s" % _("Used memory"),
  39                 "VDEF:usedmin=used,MINIMUM",
  40                 "VDEF:usedmax=used,MAXIMUM",
  41                 "VDEF:usedavg=used,AVERAGE",
  42                 "GPRINT:usedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  43                 "GPRINT:usedmin:%12s\:" % _("Minimum") + " %6.2lf",
  44                 "GPRINT:usedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  45
  46                 "STACK:buffered#4169E1:%-15s" % _("Buffered data"),
  47                 "VDEF:bufferedmin=buffered,MINIMUM",
  48                 "VDEF:bufferedmax=buffered,MAXIMUM",
  49                 "VDEF:bufferedavg=buffered,AVERAGE",
  50                 "GPRINT:bufferedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  51                 "GPRINT:bufferedmin:%12s\:" % _("Minimum") + " %6.2lf",
  52                 "GPRINT:bufferedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  53
  54                 "STACK:cached#FFD700:%-15s" % _("Cached data"),
  55                 "VDEF:cachedmin=cached,MINIMUM",
  56                 "VDEF:cachedmax=cached,MAXIMUM",
  57                 "VDEF:cachedavg=cached,AVERAGE",
  58                 "GPRINT:cachedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  59                 "GPRINT:cachedmin:%12s\:" % _("Minimum") + " %6.2lf",
  60                 "GPRINT:cachedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  61
  62 #               "STACK:free#7799ff:%-15s" % _("Free memory"),
  63 #               "VDEF:freemin=free,MINIMUM",
  64 #               "VDEF:freemax=free,MAXIMUM",
  65 #               "VDEF:freeavg=free,AVERAGE",
  66 #               "GPRINT:freemax:%12s\:" % _("Maximum") + " %6.2lf" ,
  67 #               "GPRINT:freemin:%12s\:" % _("Minimum") + " %6.2lf",
  68 #               "GPRINT:freeavg:%12s\:" % _("Average") + " %6.2lf\\n",
  69
  70                 "LINE3:swap#ff0000:%-15s" % _("Used Swap space"),
  71                 "VDEF:swapmin=swap,MINIMUM",
  72                 "VDEF:swapmax=swap,MAXIMUM",
  73                 "VDEF:swapavg=swap,AVERAGE",
  74                 "GPRINT:swapmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  75                 "GPRINT:swapmin:%12s\:" % _("Minimum") + " %6.2lf",
  76                 "GPRINT:swapavg:%12s\:" % _("Average") + " %6.2lf\\n",
  77         ]
  78
  79         rrd_graph_args = [
  80                 "--title", _("Memory Usage"),
  81                 "--vertical-label", _("Percent"),
  82
  83                 # Limit y axis.
  84                 "--upper-limit", "100",
  85                 "--lower-limit", "0",
  86                 "--rigid",
  87         ]
  88
  89
  90 class DataSourceMemory(base.DataSource):
  91         name = "memory"
  92         description = "Memory Usage Data Source"
  93
  94         templates = [GraphTemplateMemory,]
  95
  96         rrd_schema = [
  97                 "DS:used:GAUGE:0:100",
  98                 "DS:cached:GAUGE:0:100",
  99                 "DS:buffered:GAUGE:0:100",
 100                 "DS:free:GAUGE:0:100",
 101                 "DS:swap:GAUGE:0:100",
 102         ]
 103
 104         @classmethod
 105         def autocreate(cls, collecty, **kwargs):
 106                 # Every system has got memory.
 107                 return cls(collecty, **kwargs)
 108
 109         def read(self):
 110                 f = None
 111
 112                 try:
 113                         f = open("/proc/meminfo")
 114                         for line in f.readlines():
 115                                 if line.startswith("MemTotal:"):
 116                                         total = float(line.split()[1])
 117                                 if line.startswith("MemFree:"):
 118                                         free = float(line.split()[1])
 119                                 elif line.startswith("Buffers:"):
 120                                         buffered = float(line.split()[1])
 121                                 elif line.startswith("Cached:"):
 122                                         cached = float(line.split()[1])
 123                                 elif line.startswith("SwapTotal:"):
 124                                         swapt = float(line.split()[1])
 125                                 elif line.startswith("SwapFree:"):
 126                                         swapf = float(line.split()[1])
 127
 128                         ret = [
 129                                 "%s" % ((total - (free + buffered + cached)) * 100 / total),
 130                                 "%s" % (cached * 100 / total),
 131                                 "%s" % (buffered * 100 / total),
 132                                 "%s" % (free * 100 / total),
 133                         ]
 134
 135                         if swapt:
 136                                 ret.append("%s" % ((swapt - swapf) * 100 / swapt))
 137                         else:
 138                                 ret.append("0")
 139
 140                         return ":".join(ret)
 141                 finally:
 142                         if f:
 143                                 f.close()